I'm trying to display a 3D drone object in through my camera. I have create ARSceneView and configure it properly and created a scene. I have also properly pass the object to that sceneView but when i run my app the object does not show any where, i have set its positioning also but still not getting the object anywhere. How can i see my object?My code to set scene and configuration is this,
func setupScene(){
let scene = SCNScene()
arView.scene = scene
}
func setupConfiguration(){
let configure = ARWorldTrackingConfiguration()
arView.session.run(configure)
}
func addDrone() {
drone.loadModel()
arView.scene.rootNode.addChildNode(drone)
}
This is my drone class for making the object as a childnode,
class Drone: SCNNode {
func loadModel() {
guard let virtualObjectScene = SCNScene(named: "Drone.scn") else { return }
let wrapperNode = SCNNode()
for child in virtualObjectScene.rootNode.childNodes {
wrapperNode.addChildNode(child)
}
addChildNode(wrapperNode)
}
}
How can i get to see that?
Looking at your code it looks like your Drone Class never gets initialised.
If your SCNScene is in an .scnassets folder you also need to include that in your path.
Lets say therefore, that you have a folder named: ARAssets.scnassets
Your Drone Class should look like this:
class Drone: SCNNode{
override init() {
super.init()
guard let virtualObjectScene = SCNScene(named: "ARAssets.scnassets/Drone.scn") else { return }
let wrapperNode = SCNNode()
for child in virtualObjectScene.rootNode.childNodes {
wrapperNode.addChildNode(child)
}
self.addChildNode(wrapperNode)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
And to actually load it you should do something like this in your viewController:
func addDrone() {
let droneNode = Drone()
droneNode.position = SCNVector3(0, 0, -1.5)
self.augmentedRealityView.scene.rootNode.addChildNode(droneNode)
}
You may also need to adjust the scale property of your Drone Node as well e.g
droneNode.scale = SCNVector3(0.01, 0.01. 0.01)
Related
I'm trying to learn how to make a GameManager type class, and making individual classes for each of my GameScenes... probably the wrong thing to do, but for the sake of this question, please accept this as the way to do things.
My GameManager looks like this, having a reference to each of the scenes, that's static:
import SpriteKit
class GM {
static let scene2 = SecondScene()
static let scene3 = ThirdScene()
static let home = SKScene(fileNamed: "GameScene")
}
How do I create a SKScene programmatically, without size info, since they're in a subclass of SKScene and don't have any idea what the view size is, and I don't want them to need worry about this:
I'm doing this, but getting a EXC_BAD_Access at convenience override init()
class SecondScene: SKScene {
override init(size: CGSize){
super.init(size: size)
}
convenience override init(){
self.init()
self.backgroundColor = SKColor.red
self.anchorPoint = CGPoint(x: 0.5, y: 0.5)
}
}
As I mentioned your question is a bit vague but lets do some examples of what a GameManager class can be.
Before I start lets differentiate between calling this
let scene = StartScene(size: ...)
and this
let scene = SKScene(fileNamed: "StartScene")
The 1st method, with size, is when you create your scenes all in code and you are not using the xCode visual level editor.
The 2nd method is when you are using the Xcode level editor, so you would need to create a StartScene.sks file. Its that .sks file that it looks for in fileNamed.
Now for some game manager example, lets first imagine we have 3 SKScenes.
class StartScene: SKScene {
override func didMove(to view: SKView) { ... }
}
class GameScene: SKScene {
override func didMove(to view: SKView) { ... }
}
class GameOverScene: SKScene {
override func didMove(to view: SKView) { ... }
}
Lets say you want to transition from StartScene to GameScene, you would add this code in your StartScene at the correct spot e.g when the play button is pressed. Thats the simplest way to move from one SKScene to the next, directly from the SKScene itself.
// Code only, no xCode level editor
let gameScene = GameScene(size: CGSize(...))
let transition = SKTransition...
gameScene.scaleMode = .aspectFill
view?.presentScene(gameScene, transition: transition)
// With xCode level editor (returns an optional so needs if let
// This will need the GameScene.sks file with the correct custom class set up in the inspector
// Returns optional
if let gameScene = SKScene(fileNamed: "GameScene") {
let transition = SKTransition...
gameScene.scaleMode = .aspectFill
view?.presentScene(gameScene, transition: transition)
}
Now for some actual examples of GameManagers, Im sure you know about some of them already.
EXAMPLE 1
Lets say we want a scene loading manager. You approach with static methods will not work because a new instance of SKScene needs be created when you transition to one, otherwise stuff like enemies etc will not reset. Your approach with static methods means you would use the same instance every time and that is no good.
I personally use a protocol extension for this.
Create a new .swift file and call it SceneLoaderManager or something and add this code
enum SceneIdentifier: String {
case start = "StartScene"
case game = "GameScene"
case gameOver = "GameOverScene"
}
private let sceneSize = CGSize(width: ..., height: ...)
protocol SceneManager { }
extension SceneManager where Self: SKScene {
// No xCode level editor
func loadScene(withIdentifier identifier: SceneIdentifier) {
let scene: SKScene
switch identifier {
case .start:
scene = StartScene(size: sceneSize)
case .game:
scene = GameScene(size: sceneSize)
case .gameOver:
scene = GameOverScene(size: sceneSize)
}
let transition = SKTransition...\
scene.scaleMode = .aspectFill
view?.presentScene(scene, transition: transition)
}
// With xCode level editor
func loadScene(withIdentifier identifier: SceneIdentifier) {
guard let scene = SKScene(fileNamed: identifier.rawValue) else { return }
scene.scaleMode = .aspectFill
let transition = SKTransition...
view?.presentScene(scene, transition: transition)
}
}
Now in the 3 scenes conform to the protocol
class StartScene: SKScene, SceneManager { ... }
and call the load method like so, using 1 of the 3 enum cases as the scene identifier.
loadScene(withIdentifier: .game)
EXAMPLE 2
Lets make a game manager class for game data using the Singleton approach.
class GameData {
static let shared = GameData()
private init() { } // Private singleton init
var highscore = 0
func updateHighscore(forScore score: Int) {
guard score > highscore else { return }
highscore = score
save()
}
func save() {
// Some code to save the highscore property e.g UserDefaults or by archiving the whole GameData class
}
}
Now anywhere in your project you can say
GameData.shared.updateHighscore(forScore: SOMESCORE)
You tend to use Singleton for things where you only need 1 instance of the class. A good usage example for Singleton classes would be things such as helper classes for Game Center, InAppPurchases, GameData etc
EXAMPLE 3
Generic helper for storing some values you might need across all scenes. This uses static method approach similar to what you were trying to do. I like to use this for things such as game settings, to have them in a nice centralised spot.
class GameHelper {
static let enemySpawnTime: TimeInterval = 5
static let enemyBossHealth = 5
static let playerSpeed = ...
}
Use them like so in your scenes
... = GameHelper.playerSpeed
EXAMPLE 4
A class to manage SKSpriteNodes e.g enemies
class Enemy: SKSpriteNode {
var health = 5
init(imageNamed: String) {
let texture = SKTexture(imageNamed: imageNamed)
super.init(texture: texture, color: SKColor.clear, size: texture.size())
}
func reduceHealth(by amount: Int) {
health -= amount
}
}
Than in your scene you can create enemies using this helper class and call the methods and properties on it. This way you can add 10 enemies easily and individually manage their health etc. e.g
let enemy1 = Enemy(imageNamed: "Enemy1")
let enemy2 = Enemy(imageNamed: "Enemy2")
enemy1.reduceHealth(by: 3)
enemy2.reduceHealth(by: 1)
Its a massive answer but I hope this helps.
I am using SpriteKit and I am loading a SceneKit file that contains a number of sprites with custom classes. The scene never actually loads though because it reaches the first custom class and throws the fatalerror from the required init?(coder:) initializer. The custom class implements an initializer though and I am having trouble pinning down why it is choosing that initializer over the one I provided.
Custom Class:
class Bat: SKSpriteNode, GameSprite {
var initialSize: CGSize = CGSize(width: 44, height: 24)
var textureAtlas: SKTextureAtlas = SKTextureAtlas(named: "Enemies")
var flyAnimation = SKAction()
init() {
super.init(texture: nil, color: .clear, size: initialSize)
self.physicsBody = SKPhysicsBody(circleOfRadius: size.width / 2)
self.physicsBody?.affectedByGravity = false
createAnimations()
self.run(flyAnimation)
}
required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") }
func createAnimations() {
let flyFrames: [SKTexture] = [textureAtlas.textureNamed("bat"),
textureAtlas.textureNamed("bat-fly")]
let flyAction = SKAction.animate(with: flyFrames, timePerFrame: 0.12)
flyAnimation = SKAction.repeatForever(flyAction)
}
func onTap() {}
}
And here is the code attempting to load the scene and then loop through the children and initialize them:
Encounter Manager:
class EncounterManager {
// Store encounter file names
let encounterNames: [String] = [
"EncounterA"
]
// Each encounter is a node, store an array
var encounters: [SKNode] = []
init() {
// Loop through each encounter scene and create a node for the encounter
for encounterFileName in encounterNames {
let encounterNode = SKNode()
// Load the scene file into a SKScene instance and loop through the children
if let encounterScene = SKScene(fileNamed: encounterFileName) {
for child in encounterScene.children {
// Create a copy of the scene's child node to add to our encounter node
// Copy the position, name, and then add to the encounter
let copyOfNode = type(of: child).init()
copyOfNode.position = child.position
copyOfNode.name = child.name
encounterNode.addChild(copyOfNode)
}
}
// Add the populated encounter node to the array
encounters.append(encounterNode)
}
}
// This function will be called from the GameScene to add all the encounter nodes to the world node
func addEncountersToScene(gameScene: SKNode) {
var encounterPosY = 1000
for encounterNode in encounters {
// Spawn the encounters behind the action, with increasing height so they do not collide
encounterNode.position = CGPoint(x: -2000, y: encounterPosY)
gameScene.addChild(encounterNode)
// Double Y pos for next encounter
encounterPosY *= 2
}
}
}
What I have noticed using breakpoints though is that it never gets past loading the scene. It fails on the line if let encounterScene = SKScene(fileNamed: encounterFileName) and the error is the fatal error in the initializer from the Bat class.
Any help understanding why it picks one initializer over the other would be greatly appreciated!
You are doing:
if let encounterScene = SKScene(fileNamed: encounterFileName)
Which calls SKScene's init(fileNamed:) which loads a file and decodes it with SKScene's coder init. That init loads the file and decodes each element in it with the node's coder init.
If you want to load from a file, you need to implement the coder init.
I designed a SKSpriteNode subclass Ship, and I want to know how to go about animating it with a couple different images. I'm currently passing in an original image with:
class Ship:SKSpriteNode{
static var shipImage = SKTexture(imageNamed:"Sprites/fullShip.png")
init(startPosition startPos:CGPoint, controllerVector:CGVector){
super.init(texture: Ship.shipImage, color: UIColor.clearColor(), size: Ship.shipImage.size())
but I'm not sure how to loop through an image atlas afterwards. I first attempted using a method inside the class that was then called in the update function:
func animateShip() {
self.runAction(SKAction.repeatActionForever(
SKAction.animateWithTextures(shipAnimationFrames,
timePerFrame: 0.2,
resize: false,
restore: true)),
withKey:"shipBlink")
print("animate")
}
var shipAnimationFrames : [SKTexture]! is declared right above GameScene, and this block is located in didMoveToView
//Ship animation
let shipAnimatedAtlas = SKTextureAtlas(named: "ShipImages")
var blinkFrames = [SKTexture]()
let numImages = shipAnimatedAtlas.textureNames.count
for var i=1; i<=numImages; i += 1 {
let shipTextureName = "samShip\(i).png"
blinkFrames.append(shipAnimatedAtlas.textureNamed(shipTextureName))
}
shipAnimationFrames = blinkFrames
Any help would be awesome!
Texture Atlas
First of all you need to create a texture atlas into Assets.xcassets. You'll put here the images related to the frames of your character.
Subclassing SKSpriteNode
This is how you create you own sprite with a beginAnimation method
class Croc: SKSpriteNode {
init() {
let texture = SKTexture(imageNamed: "croc_walk01")
super.init(texture: texture, color: .clearColor(), size: texture.size())
}
func beginAnimation() {
let textureAtlas = SKTextureAtlas(named: "croc")
let frames = ["croc_walk01", "croc_walk02", "croc_walk03", "croc_walk04"].map { textureAtlas.textureNamed($0) }
let animate = SKAction.animateWithTextures(frames, timePerFrame: 0.1)
let forever = SKAction.repeatActionForever(animate)
self.runAction(forever)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
As you can see the beginAnimation method creates a texture atlas using the same name of the texture atlas I previously created in Assets.xcassets.
Then the an array of textures is created (frames) and used as parameter to create the animate action.
Starting the animation
Now you need to create your sprite and invoke beginAnimation just once. You do NOT have to invoke beginAnimations inside any update method otherwise you will create a new animation every new frame. The is wrong. beginAnimation must be called only once.
Here's an example
class GameScene: SKScene {
override func didMoveToView(view: SKView) {
let croc = Croc()
croc.position = CGPoint(x:CGRectGetMidX(self.frame), y:CGRectGetMidY(self.frame))
addChild(croc)
croc.beginAnimation()
}
}
I have a game where Falling Nodes fall down and hit the Base Number Sprite Node and game logic is run from there. When I set up a new game from scratch the collision detection works exactly how it should. My problem occurs when I create a game from a previous save using NSCoding. In both cases (new game and continue from save game) the physics bodies are the same - dynamic, same size body, same contactTestBitMask, same categoryBitMask. I have tested all of this so I know it is true. The physics contact delegate is also set to the right object. In a game continued from a save, however, the contacts are not registered and I cannot figure out why. The only thing I can think of, but am unable to figure out is object which is set as my physics contact delegate and is the parent of the objects I want collision detection for gets loaded/unarchived without me actually calling decodeObjectForKey for it.
Any help would be much appreciated
func initBaseNumberSpritePhysicsBody() {
baseNumberSprite.physicsBody = nil
baseNumberSprite.physicsBody = SKPhysicsBody(rectangleOfSize: baseNumberSprite.size)
baseNumberSprite.physicsBody!.categoryBitMask = baseNumberCategory
baseNumberSprite.physicsBody!.contactTestBitMask = fallingNodeCategory
baseNumberSprite.physicsBody!.collisionBitMask = 0
baseNumberSprite.physicsBody!.usesPreciseCollisionDetection = true
baseNumberSprite.physicsBody!.allowsRotation = false
}
func initPhysicsBodyForFallingNode(node: NumberNode) {
node.physicsBody = nil
node.physicsBody = SKPhysicsBody(rectangleOfSize: node.size)
node.physicsBody!.categoryBitMask = fallingNodeCategory
node.physicsBody!.contactTestBitMask = baseNumberCategory
node.physicsBody!.collisionBitMask = 0
node.physicsBody!.allowsRotation = false
node.physicsBody!.velocity = nodeVelocity
}
func didBeginContact(contact: SKPhysicsContact) {
if isContactBetween(fallingNodeCategory, and: baseNumberCategory, contact: contact) {
handleContactBetweenFallingNodeAndBaseNumber(contact)
} else {
print("\nUNKNOWN CONTACT OCCURED\n")
}
updateInternalState()
checkGameOverCondition()
}
required init?(coder aDecoder: NSCoder) {
// gameZone = aDecoder.decodeObjectForKey(gameZoneKey) as! GameZone
super.init(coder: aDecoder)
gameZone = self.children[0] as! GameZone //Not decoded by itself but somehow decoded with the this GameScene Object (the "self" object here)
gameZone.delegate = self
self.physicsWorld.contactDelegate = gameZone
}
override func encodeWithCoder(aCoder: NSCoder) {
super.encodeWithCoder(aCoder)
aCoder.encodeObject(gameZone, forKey: gameZoneKey) //Gets coded
}
I was able to figure out my own problem here. A fundamental understanding I was lacking is the SKNodes encode their own child nodes.
// gameZone = aDecoder.decodeObjectForKey(gameZoneKey) as! GameZone
The gameZone object is a child node. So I was encoding it as well as other key objects twice which was leading to my problem. The problem was had nothing to do with the physics world contact delegate or encoding/decoding.
Normally in a sprite kit game, when a new scene presented, all the nodes in the old scene and their content removed automatically. Now what is, if a node like "HUD" should be not removed? Is there any way in sprite kit to create a node only once and use it in all scenes without removing and creating it again and again every time in every new scene? There must be a technique that makes it possible. that's a serious sprite kit design problem, if it is not possible. But I don't think so. The singleton technique is working great with an audio player, that created only once and used in all scenes. There is surley a way to create a node only once and use it in all scenes. Thanks for any idea.
You can't create a node that persists between scenes. Once you present a new scene, you would need to add the nodes to this new scene.
For this reason, I do not use SKScenes the way Apple describes in the documentation because of this issue. Not only is it cumbersome to have to add the nodes to the new scene each time but also extremely inefficient for nodes like background nodes that should always be present.
So what I did is create 2 scenes, one for the game scene and one for the menu (GUI).
For the menu scene I subclass SKNodes for my interface and then use SKActions on these nodes to present and dismiss them on the screen so it feels like the user is transitioning between scenes. This gives you total customization because you can present multiple nodes, you can keep nodes on the screen permanently etc.
By subclassing the SKNodes you can organize your code just as you did for the scenes. Each node will represent a "scene" in your App. Then you just need to write a method to present and dismiss these nodes.
I've added some sample code below to show one implementation of using SKNodes as "Scenes." The sample code has a base class called SceneNode which we subclass (just as you would subclass an SKScene). In this implementation, I use the GameScene to handle all transitions between scene nodes*. I also keep track of the current scene node so that I can update its layout in case the scene changes size (such as rotation or window resize on OS X**). Your game might not need this, but it's a great way to dynamically layout your nodes. Anything that you want to add to the background or keep around, simply add it to the GameScene. Anything that you want to add to a scene, simply subclass a SceneNode, transition to it and your good to go.
*You could easily present scene nodes directly from other scene nodes instead of going through the GameScene. However I have found that using the GameScene to handle transitions between nodes works very well, especially when you have many scenes with complex transitions.
**There is a bug on OS X, resizing the window does not call the scene's didChangeSize. You need to manually call it.
class GameViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let scene = GameScene(size:self.view.bounds.size)
scene.scaleMode = .ResizeFill
(self.view as! SKView).presentScene(scene)
}
}
class GameScene: SKScene {
var currentSceneNode: SceneNode!
override func didMoveToView(view: SKView) {
self.backgroundColor = SKColor.whiteColor()
transitionToScene(.Menu)
}
override func didChangeSize(oldSize: CGSize) {
currentSceneNode?.layout()
}
func transitionToScene(sceneType: SceneTransition) {
switch sceneType {
case .Menu:
currentSceneNode?.dismissWithAnimation(.Right)
currentSceneNode = MenuSceneNode(gameScene: self)
currentSceneNode.presentWithAnimation(.Right)
case .Scores:
currentSceneNode?.dismissWithAnimation(.Left)
currentSceneNode = ScoresSceneNode(gameScene: self)
currentSceneNode.presentWithAnimation(.Left)
default: fatalError("Unknown scene transition.")
}
}
}
class SceneNode: SKNode {
weak var gameScene: GameScene!
init(gameScene: GameScene) {
self.gameScene = gameScene
super.init()
}
func layout() {}
func presentWithAnimation(animation:Animation) {
layout()
let invert: CGFloat = animation == .Left ? 1 : -1
self.position = CGPoint(x: invert*gameScene.size.width, y: 0)
gameScene.addChild(self)
let action = SKAction.moveTo(CGPoint(x: 0, y: 0), duration: 0.3)
action.timingMode = SKActionTimingMode.EaseInEaseOut
self.runAction(action)
}
func dismissWithAnimation(animation:Animation) {
let invert: CGFloat = animation == .Left ? 1 : -1
self.position = CGPoint(x: 0, y: 0)
let action = SKAction.moveTo(CGPoint(x: invert*(-gameScene.size.width), y: 0), duration: 0.3)
action.timingMode = SKActionTimingMode.EaseInEaseOut
self.runAction(action, completion: {self.removeFromParent()})
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
class MenuSceneNode: SceneNode {
var label: SKLabelNode
var container: SKSpriteNode
override func layout() {
container.position = CGPoint(x: gameScene.size.width/2.0, y: gameScene.size.height/2.0)
}
override init(gameScene: GameScene) {
label = SKLabelNode(text: "Menu Scene")
label.horizontalAlignmentMode = .Center
label.verticalAlignmentMode = .Center
container = SKSpriteNode(color: UIColor.blackColor(), size: CGSize(width: 200, height: 200))
container.addChild(label)
super.init(gameScene: gameScene)
self.addChild(container)
self.userInteractionEnabled = true
}
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
self.gameScene.transitionToScene(.Scores)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
class ScoresSceneNode: SceneNode {
var label: SKLabelNode
var container: SKSpriteNode
override func layout() {
container.position = CGPoint(x: gameScene.size.width/2.0, y: gameScene.size.height/2.0)
}
override init(gameScene: GameScene) {
label = SKLabelNode(text: "Scores Scene")
label.horizontalAlignmentMode = .Center
label.verticalAlignmentMode = .Center
container = SKSpriteNode(color: UIColor.blackColor(), size: CGSize(width: 200, height: 200))
container.addChild(label)
super.init(gameScene: gameScene)
self.addChild(container)
self.userInteractionEnabled = true
}
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
self.gameScene.transitionToScene(.Menu)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
enum SceneTransition{
case Menu, Scores
}
enum Animation {
case Left, Right, None
}